Patent GB-316383-A (GB)
Title: Improvements in starting devices for internal combustion engines
IPC: F02N99/00
Filed: 1928-06-13
Abstract: 316,383. Baron, M. June 13, 1928. Starting.-Combustible mixture for starting an engine is supplied to the cylinders by a rotary or sliding distributing valve, which is normally at rest and is moved by a starting lever into engagement with an abutment on an engine-driven shaft, so that the mixture will be admitted to a suitable cylinder or cylinders in accordance with the position in which the engine was stopped and the valve will then be actuated to supply the mixture to the cylinders in turn. In one form, Fig. 1, a rotary distributing valve D supplies mixture through the sparking-plugs I on the engine cylinders and is connected to a carburettor C supplied with compressed air from a receiver B through a valve V. The receiver is charged by a hand pump P or by an air compressor K operated by the explosion gases in an engine cylinder. Starting is effected by rotating a handle H which opens the compressed-air valve V, drives an ignition magneto M, and moves the distributor D axially to bring an arm 3 on the shaft 4 of the distributor into engagement with one of a set of abutments 2 on the cam shaft 1 or other engine-driven shaft. In a modification, Fig. 2, actuation of a handle H brings a sliding distributor valve D axially into engagement with a cam 2 on the shaft 1, the movement being effected either by a cam actuated by the handle H or by the admission of compressed air behind a piston 11 connected to the valve D. When the rod 3 of the distributor engages the cam 2, further movement of the piston 11 uncovers a port 14 and admits the compressed air through the carburettor C to the casing of the valve D. The handle H is also arranged to tension and then release a spring r for actuating the starting magneto M. In another modification, Fig. 5, a rotary distributor valve D is carried by an internally threaded sleeve 4 mounted on a threaded part 27 of the shaft 20 of the handle H. A spring 25 normally holds the shaft 20 and valve D in the position shown. At starting, the shaft 20 is moved axially by means of the handle H to bring the arm 3 into the path of the abutment 2 on the engine-driven shaft 1, and the valve port 26 into the plane of the outlet pipes d, and the handle is then turned. The arm 3 is held by the abutment 2 and the thread 27 causes the shaft 20 to recede axially until an arm 28 in pin- and-slot connection with the shaft 20 comes into the path of a stud 31 on a disc 30. The shaft 20 and the arm 28 then rotate and turn the disc, which carries an adjustable cam C' for opening the valve V supplying compressed air through a carburettor to the distributor D and the engine. The disc 30 is also geared to a pinion on the shaft of the ignition magneto, and is eccentrically mounted, so that the magneto shaft is first turned slowly, tensioning a spring r, and is then released by the separation of the abutments 28, 31, allowing the spring r to actuate the magneto and fire the starting mixture. The arm 3 is moved out of the path of the abutment 2, when the engine starts, by the spring 25 or by centrifugal or other means.